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General Information: 0A-5 Standard Tightening Torque NOTE • For the flanged bolt, flanged nut and self-lock nut of 4T and 7T strength, add 10% to the tightening torque given in the following chart. • The following chart is applicable only where the fastened parts are made of steel light alloy.
Tightening torque chart Strength Unit Thread Diameter (Nominal Diameter) (mm) 4 5 6 8 10 12 14 16 18 A equivalent of 4T strength fastener N ⋅m kgf-m lb-ft 1.5 0.15 1.0 3.0 0.30 2.5 5.5 0.55 4.0 13 1.3 29 2.9 21.0 45 4.5 32.5 65 6.5 47.0 105 10.5 160 16.0 116.0 A equivalent of 6.8 strength N ⋅m kgf-m lb-ft 2.4 0.24 2.0 4.7 0.47 3.5 8.4 0.84 6.0 20 2.0 14.5 42 4.2 30.5 80 8.0 58.0 125 12.5 193 19.3 139.5 280 28.0 202.5 A equivalent of 6.8 strength N ⋅m kgf-m lb-ft 2.4 0.24 2.0 4.9 0.49 3.5 8.8 0.88 6.5 21 2.1 15.5 44 4.4 32.0 84 8.4 61.0 133 13.3 203 20.3 147.0 298 29.8 215.5 A equivalent of 7T strength fastener N ⋅m kgf-m lb-ft 2.3 0.23 2.0 4.5 0.45 3.5 10 1.0 23 2.3 17.0 50 5.0 36.5 85 8.5 61.5 135 13.5 210 21 152.0 240 24 174.0 A equivalent of 8.8 strength bolt (8 N ⋅m kgf-m lb-ft 3.1 0.31 2.5 6.3 0.63 4.5 11 1.1 27 2.7 19.5 56 5.6 40.5 105 10.5 168 16.8 121.5 258 25.8 187.0 373 37.3 270.0 A equivalent of 8.8 strength bolt (8 N ⋅m kgf-m lb-ft 3.2 0.32 2.5 6.5 0.65 5.0 12 1.2 29 2.9 21.0 59 5.9 43.0 113 11.3 175 17.5 126.5 270 27 195.5 395 39.5 286.0 I1SQ01010004-01 I1SQ01010005-01 I1SQ01010006-01 I1SQ01010007-01 I1SQ01010008-01 I1SQ01010009-01 |